| 轨道交通预制U形梁力学性能研究 |
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| 引用本文： | 刘孟龙,宋郁民,吴定俊.轨道交通预制U形梁力学性能研究[J].铁道标准设计通讯,2018(3):75-79. |
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| 作者姓名： | 刘孟龙 宋郁民 吴定俊 |
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| 作者单位： | 上海工程技术大学;同济大学; |
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| 摘 要： | 以青岛蓝色硅谷城际轨道交通高架桥预制U形梁为工程背景,运用有限元方法对比分析先张法和后张法预制U形梁内力、应力状态及变形3方面的力学性能。对先张法和后张法U形梁进行静载试验,详细分析试验荷载下U形梁的刚度及抗裂性等指标。结果表明,先张法预应力U形梁力学性能优越,具有推广应用潜力。
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| 关 键 词： | 预制U形梁 先张法 后张法 力学性能 轨道交通 |
Research on Mechanical Properties of Prefabricated U-Beam in Rail Transit |
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| Institution: | ,Shanghai University of Engineering Science,Tongji University |
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| Abstract: | In view of the Blue Silicon Valley intercity rail transit in Qingdao,this paper,with the help of finite element method,analyzes the mechanical properties of the pre-tensioned U-beam and posttensioned U-beam in terms of the internal force,stress state and deformation.Then,static load tests of the two types of U-beams are conducted to obtain indicators such as stiffness,crack resistance and so on.The results show that the pre-tensioned U-beam is advantageous in mechanical properties and could be used widely. |
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| Keywords: | Prefabricated U-beam Pre-tensioning method Post-tensioning method Mechanical properties Rail transit |
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